Add Yahoo as a preferred source to see more of our stories on Google. A wastewater heat recovery system operates Tuesday, Dec. 2, 2025, at the National Western Center in Denver. (AP Photo/Brittany ...

Researchers at Princeton and UCLA have developed a passive mechanism to cool buildings in the summer and warm them in the winter. In an article published June 27 in the journal Cell Reports Physical ...

For industrial and commercial facilities, simultaneous heating and cooling needs across a building, or even a single floor, bring challenges to both near-term energy management and long-term ...

When a massive event center was being developed in Denver, planners had to contend with two existing 6-foot (1.8 meters) wide sewer pipes that emptied into the river, creating an unsightly dilemma.